New records of Platynectes (s. str.) diving beetles from South America with description of two new species (Coleoptera: Dytiscidae: Agabinae) Author Short, Andrew Edward Z. Department of Ecology & Evolutionary Biology & Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, Author Benetti, Cesar J. Coordenação de Biodiversidade, Programa de Pós-Graduação em Entomologia (PPGEnt), Instituto Nacional de Pesquisas da Amazônia (INPA), Av. André Araújo 2936, CEP 69067 - 375, Manaus, AM, Brazil Author Gustafson, Grey T. Department of Ecology & Evolutionary Biology & Division of Entomology, Biodiversity Institute, University of Kansas, Lawrence, KS 66045, text Acta Entomologica Musei Nationalis Pragae 2020 2020-07-28 60 2 437 447 journal article 8108 10.37520/aemnp.2020.28 6b3b89b6-c33a-4315-8dad-f12546fdab38 1804-6487 4489358 9D3BD503-9738-49FC-8580-87A09B54D4E0 Key to the South American Platynectes (s. str.) species groups 1 Venter primarily pale colored, at most infuscate medially on metaventrite, metaventral wings, and abdomen. Northern South America. .................................... 2 – Venter primarily dark colored, mostly black to brown except on the prosternum and epipleura and in some species, the abdomen as well. Brazil . ........................... 3 2 Venter not infuscate, reddish-orange throughout. ........ ................................... P. submaculatus species group – Venter distinctly infuscate, usually with metaventrite, metacoxal wing, and abdomen medially infuscate. ...... ................................. P. agallithoplotes species group 3 Abdomen darkly colored. ................................................. ........................................ P. nigerrimus species group – Abdomen lightly colored. ................................................. ....................................... P. ornatifrons species group